Developer's DescriptionBy AiltwareConvert Microsoft Excel 97-2003 documents to Excel 2007 and 2010 formats.Ailt XLS to XLSX XLSM Converter is a powerful Excel converter which can batch convert Excel 97-2003(*.XLS) to Excel 2007 2010(*.XLSX,*.XLSM) file with accurately retaining the layout of the original Excel file. More, the conversion speed is very fast. It is easy to use without any technical requirements. Merely a few clicks can finish the conversion.